chase3

iTrader: (1)

building a brand new ls3 416. car has a 76mm rear mount turbo with .96 exhaust housing..not looking for an exotic cam its still the DD. I have been looking at the virginia speed cams as i would like to go with split duration..Thanks for input!!! Chase

caindo

iTrader: (4)

ed curtis just cut mine

chase3

iTrader: (1)

what were the specs?

chase3

iTrader: (1)

Anyone??

Chevy406

iTrader: (12)

Good luck. Most people that have a lot of experience with turbo cam profiles aren't willing to share their favorite profiles. I just got my Virginia Speed turbo cam this weekend.

chase3

iTrader: (1)

Yeah thats what i am finding out. Which to me is a bunch of BS. I am not going to start selling their cam. i just want something that soungs great and is well matched with a turbo and 416 ci

HUNTER02SS

iTrader: (24)

Go with something in the range of 600-630's lift and duration in the 240's on a 114lsa. My cams have always been single pattern spec's. Split patterns work well also, just preference I guess? Just make sure your valve springs are up to the task for the camshaft you choose.

Inspector12

iTrader: (29)

I'm with Hunter on this I like strait pattern cams although I would stay .600 or less to be easier on your daily drivers drivetrain components and no less than a 113 or higher lsa like a 236/236 598/610 114 but you can try some trick cam and not to say they won't work well cause they may, but at the HP levels you and your dad have told me it won't make a huge difference in power. I know you still wanted to hear your cam and you can do that, but remember you will be trading one thing for another. GL! I still have the turbo ground cam from Speed Inc. If you want it I would sell it as I sold my turbo kit. LMK if I can help.
Jeff

pwrtrip75

iTrader: (8)

Because they think the cam specs are a huge factor and is something new in the world of boost.

chase3

iTrader: (1)

Lol yeah I agree lol

engineermike

236 - 24X seems rather large to me with 416 cid and a 76 mm rearmount. The turbo will be out of steam at 5000 - 5500 rpm, when the cam is just picking up. I'd recommend something more like 21X/22X-114.

chase3

iTrader: (1)

But being 416 cubic inches a cam that small i would think hurt me. I dont really think a high 230's or low 240's cam is really that huge when you are 416. Texas speed told me that a rule of thumb is going from 346 to 416 you should add 10 degrees duration since you are moving alot more air the valve will need to be open longer

HUNTER02SS

iTrader: (24)

This probably a true statement, but what the OP is saying is that with a 416ci. motor, the 76mm turbo is small. If you go with a larger cam, by the time you get in the cams sweetspot, the turbo will be done. You really want to match the cam and turbo size to work together so one is not running out of steam before the other.

engineermike

That's right. See the following thread (408 ford with an MPT70):

http://www.theturboforums.com/smf/in...topic=124912.0

I would think that the turbo will prevent much from happening over 5000 rpm, so you could benefit from camming it to peak at or near 5000 rpm.

chase3

iTrader: (1)

i see what your saying now. Wouldnt you think something in like the 230's atleast though? even a stock ls7 cam is 230 lol. Thanks for all the input BTW

engineermike

The LS7 cam is 230 on the exhaust only. It's only 211 on the intake, which is more influencial to rpm range. Also, note that the LS7 architecture is very similar to your 416 cid LS3, so the power range should be similar too. The stock LS7 peaks at 5800-6400, so you're already starting too high. In all fairness, the wide LSA of the LS7 cam moves the rpm range up a little, but it gives you a feel for things.